.inputNum {
  vertical-align: middle;
  height: 22px;
  border: 1px solid #d0d0d0;
  text-align: center;
}

.btn {
  display: inline-block;
  vertical-align: middle;
  background: #f0f0f0 no-repeat center;
  border: 1px solid #d0d0d0;
  width: 50px;
  height: 50px;
  border-radius: 2px;
  box-shadow: 0 1px rgba(100, 100, 100, 0.1);
  color: #666;
  transition: color 0.2s, background-color 0.2s;
}

.btn:active {
  box-shadow: inset 0 1px rgba(100, 100, 100, 0.1);
}

.btn:hover {
  background-color: #e9e9e9;
  color: #333;
}

.btn_plus {
  background-image: linear-gradient(to top, currentColor, currentColor),
    linear-gradient(to top, currentColor, currentColor);
  background-size: 20px 2px, 2px 20px;
}

.btn_minus {
  background-image: linear-gradient(to top, currentColor, currentColor);
  background-size: 20px 2px, 2px 20px;
}
